SONIC [Stationery] Time-sensing timer 3, 2, 1! Sense the time with colors and let you know the time with lights

Once you set the time and press the start button, the countdown will appear, helping to increase your motivation and concentration.
As time passes, the colored areas of the digital display decrease, allowing you to visually sense the passage of time and improve your concentration.
Continuing to study while keeping your target time in mind will also help improve your learning speed.
You can set the time by simply turning the dial, so you can start studying right away.
After the time is up, it automatically switches to counting up, so you can measure the excess time.
When the countdown is finished, a "beep beep beep" sound will sound and the button on the top will light up to let you know.
The sound can be turned on or off, so it can be used in quiet places such as libraries and cram schools.
Compact size makes it easy to carry and store. Stands upright at an angle for easy viewing.